Jim, it's all a matter of how long the JT software on the receive side / transmit side is written implemented. It's simply a window where your software is listening, there is nothing going on then then when to start listening and when to stop listening / when to start transmitting and when to stop transmitting.. The point I was trying to make was that in a pinch, you should be able to use WWB and manually synch your clock within a second. All is not lost if you don't have a NTP implementation with internet access. Getting your clock with-in 1 second of WWB is not rocket science if you can hear the signal, and there are other HF transmitted time sources than WWB for other parts of the world. Plus most OS implementations of NTP will only sync your clock on a weekly basis and depending on how bad your PC clock is in parts per million PPM, a week of no synch could have you off by many seconds if not by a minutes. Google would be a good place to start if you are looking of manual ways to sync your clock... The Elecraft reflector is not the first place I would start, but it is a way to generate a bunch of email messages and get a bunch of opinions, there is no question about that. :)
The JT modes are so unbelievably slow and painful, you can multitask and watch a baseball game at the same time you are working stations every 5 minutes (JT mode water boarding at 5 minutes per Q in the best scenario). You could do a SO8R setup and still have time to drink a cup a coffee while you are keeping track of everytihng. ;) With all time you have between TX and RX, someone might want to look (google it up?) at the spec and see what the published window is suppose to be. And yes, of course if one station is 2 seconds fast and another station is 2 seconds slow, you might have a problem because the software on both ends misses the start or finish where each station's clock is off in opposite directions. I'm sure there are whole JT mode related groups where you can spend hours and hours talking about how accurate your clock should be. It's a total yawner mode, but hey, it's still fun at times.. I'll admit to that. ;) Max NG7M On Thu, Jun 15, 2017 at 1:28 PM, Jim Brown <j...@audiosystemsgroup.com> wrote: > On Thu,6/15/2017 11:59 AM, Matthew George wrote: > >> The jt modes will be fine even if you are a second or two off. >> > > Two seconds is stretching it. I've seen very strong JT65 signals that > don't decode with a time error of 1.7 sec! > > 73, Jim K9YC > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to m.matthew.geo...@gmail.com > -- M. George ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
